Transmission-gear.



P. EVANS.

TRANSMISSION GEAR.

APPLICATION FILED APR. 5, 1906 RENEWED JUNE so, 1908 905,678. PatentedDec. 1, 1908.

' 3 SHEETS-SHBBT 1 P. EVANS.

TRANSMISSION GEAR.

APPLICATION FILED APR. 5, 190a. RENEWED JUNE 30,1901

905,678. Patented Dec. 1,1908

3 SHEETS-SHBET 2 bun m, l

lillihili'lm P. EVANS.

V TRANSMISSION GEAR.

APPLICATION FILED APR 5, 190B. RENEWED JUNE 30. 1908.

905,678. Patented Dec. 1, 1908.

' a BHEETS-BHBET ay III UNITED scra'ras rArrENT OFFICE.

POWELL EVANS, OF PHILADELPHIA, PENNSYLVANIA.

TRANSMISSION-GE AR.

Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed April 6, 1906, Serial No. 310,148. Renewed June 30,1908. Serial No. 441,244.

To all whom it may concern: Be it known that I, POWELL Evans, :1 c tizenof the United States, residingin Philadelphia, Pennsylvania, haveinvented certain lmn-ovements in Transmission-Gears, of which thefollowin I is a specification.

My invention re ates to a novel form ofgearing particularly designed totransmit power from a driving to a driven shaft, such One ob 'ect of theinvention is to provide a transmission gtar of the above t pc with itsparts so arrang'ed that they she. I be few in number. light in weight,and of relatively small size for the transmission of a given power, thecombination being such that the driving shaft shall forthree of itsspeeds be directly t'nlllltcltd to the engine shaft through suitablegears on each shaft, for the fourth speed driven from the engine shaftthrough a single auxiliar reverse drive shall incl iide the auxiliaryshaft and a reverse gear supported on a third shaft. I further desire toprovide mechanism for controllin r the speed changing apparatuswhich'sha l have but few parts. and shall be of such a nature as to berelatively reliable, durable and easy of operation: said mechanismincluding locking means for preventing accidental or improper operationof the gear These objects and other advantageous ends I. secure ashereinafter set forth, reference being had to the accompanying drawings,in which:

Figure 1, is a plan, to some extent dingrammatic, show iug my inventionas applied to an automobile; Fig. 2, is a horizonta section illustratingmy improved transmission gear as designed for application to anautomobile; Fig. 3, is a vertical section taken on the line 2-2, Fig. 2;Figs. 4, 5 and '6, are front elevations of the gear controllingmechanism, showing the positions occupied by the speed controlling lcveand its associated apparatus corresponding to thevarious gearcombinations for prodncin r certain dcsircd spccds of operation of theriven shaft Fig. 7. is a verticalscction taken on the hue 7-7,

shaft, and for the.

Fig. 4, of the mechanism shown in said figure, and Fig. 8, is :1 Ianpartly in horizontal section showing the guide box for the speedcontrolling lever.

In the above drawings, A represents a suitable ear case into whichextends a shaft B, directly connected to the engine and hereafterreferred to as the driving shaft; there being also a shaft C at rightanglesto said shaft .13 and hereafter referred to as the driven shaft,which may itself serve as the rear axle on a Cardan drive or may drivethe rear axle through chains. This latter shaft as is common intransmission systems of the type illustrated, is made in two partsoperativt'ly connected by differential gearing consisting in the presentcase of a pair of bcvclcd pinions c, loosely carried upon a spindle c,journaled in suitable hcariu s in tie structure D and this last is rcvoubly carried within the gear case A uponthe shaft C. The two pinions cmesh with two other pinions fixed respectively to the two sections ofthe shaft C. The rcvolnble strucrl' and (I so placed as to be concentricwith the shaft C.

The shaft B, carried in suitable bearings 11 and b, has loosely mountedupon it near one'end a pair of evelcd gears 11 and b placed topermanently mesh with the bevclcd racks d and (1' respectively. Thisshaft ll is longitudinally slotted for the reception of four sliduhlekeys 1/ connected by splines b to a collar 6-", and constructed .toenter key-ways in either of the beveled gears Z) or b" to opcrativelycouple the same to said shaft. The collar 11'' with its attached keysmay be moved longitudinally along the driving shaft by means of h rod bactuated in a manner ln-rcinal'tcr dcst'ribcd. Also loosely carried uponthe driving shaft B are two gears b and c. cithcr made integral orconnected together as desired: the first bcin beveled so that it maysuitably engage with the beveled rack (/2 when properly moved upon theshaft ll by means of an arm a fixcd to a sliding bar guided in thecasing .Thcrc' is on this rod a spring c" whereby it is autonmticallyreturned to and main taiucd in such position that the gear I) is out ofmesh with the rack 1/. except when said rod is forcibly held in itsinner position so as to compress said spring. Said '0 rectly to thedriving shaft ll by means of a ture D has fixed to it three beveledracks clutch F; one member f of which is fixed to or forms art of thegear e, while the other member ft is fixed to or forms a part of thecoupled pinions l1 and I) connected to the drivin shaft, as indicated'indotted lines at b, y raised portions of the splines 1 which connect thefour keys I) to collar 6. For the purpose of moving this latter member fof the clutch and the pinions b and b", I provide a rod f having an arm1' engaging said members.

An auxiliary shaft G is carried in the easing A parallel to the shaft B,bein sup ported in bearings g and g in whic it is longitudinally movableunder the action of a second arm f connected to the rod f. This shafthas fixed to it a pinion g capable of meshing with the gear e and alsohas splined to it a gear slidable by means of an arm b carried by therod h which extends into the gear case in a manner similar to the rods 6b and j. The gear 9 is so placed that it may be moved into mesh eitherwith the gear b, on the shaft B, or with a pinion 2', carried upon athird or reverse shaft I, which is mounted in any desired manner withinthe gear case. This pinion z' meshes with the gear 5 on the drivingshaft B as long as said gear is in the position illustrated.

With the above parts occupying the positions illustrated, it will beseen that if power he applied to the shaft B, this will turn idlywithout driving any part of the structure D or the shaft C. To turn theshaft C at what I shall call the fourth speed, the rod (1 is movedinwardly so as to bring the keys 7) into the key-ways of the beveledpinion b, which is thus coupled to the driving shaft B and consequentlyturns the structure D and the shaft C. If therod 6 be moved outwardly soas to bring the keys 5 into the key-ways of the and the shaft B speed.

With the parts in the positions illustrated, the shaft 0 may be drivenat the second speed by simultaneously moving inwardly the rods (2 and f.This moves the beveled gear 6 into engagement with the beveled rack 61and sin'mltaneously brings the two clutch members f and f intoenghgement with each other, so the gears e and b are directly coupled tothe shaft B and conseuently transmit power to the shaft C t roughstructure D and the differential gearing.

It is to be noted that the inward movement of rod 7, in addition tosliding gears b and 6 with one of the clutch members g; on shaft B, alsoslides the shaft- G in its arings and keeps the gears engaged. For thefirst speed the rod e 'is moved into its inner osition so as to placethe gear b in meshwith the beveled rack d are operated at the thirdpinion 6 the structure D- g and e disand the rod f is held in theposition illus trated, so that the gear g is in mesh with the gear e.Simultaneously by inward movement of the rod lb the gear is moved uponthe auxiliary shaft G into mesh with the gear 6, so that power istransmitted to the structure D from the shaft B through gears L", g,shaft G, pinion 9, gear a, beveled gear I), and beveled rack d i Inorder to drive the shaft C in a direc tion the reverse of that abovenoted, it will be assumed that the various parts are in the positionsillustrated in Fig. 1, so that it will be necessary to move the rod einwardly to cause the'gear b to mesh with the rack d and at the sametime bring the gear in mesh with the pinion g The rod la issimultaneously moved outwardly so as to bring the gear in mesh with thepinion 2', so that, as a consequence, power is transmitted to thestructure D and to the shaft C from the shaft B to gear 6 pinion 2',gear g, shaft G, pinion 9, gear 6, beveled rack b and rack (F. w "e Ipreferably accomplish the above noted reversal by merely movingoutwardly the rod it; securing the simultaneous inward movement of therod' 6 by means of a lever pivoted outside the casin A and engagingcollars on said two rods. Vhen the inwardly acting force applied to therod h is removed this latter .as well as the rod e and their connectedparts are returned. to their neutral positions y the spring e.

From the above it will be seen that I am enabledto secure one reyerseand four forward speeds for the shaft C with the use of but a relativelysmall number of ears;- thesebeing so arranged, moreover, that it ispossible to secure the out undulv increasing the diameters of the gearsor objectionably enlarging the casing.

It will, in additionfig noted that while I. provide gearingcapa of theabove mentioned variations of speed, the number of '110 gears turningidly at any time is reduced to a minimum.

In order to suitably actuate the rods e I)", f and h to obtain thevarious combinations of gearing above described. I a paratus shown inFigs. 1 and i to 8 inc usive, part of it being contained in a box K.Fig 1. In these figures L is a fixed bar extendin transversely of themachine and supported a transverse shaft M forming part of the ordinarbrake mechanism.

The our rods e, b", and h extend to and are guided by flanged rollers Zon the bar L being properly spaced b sections of pi e laced on said arbetween the rollers. sellers 1 are fixed totire bar against theoutermost of the rollers l for the ,purpose of maintaining the abovenoted apparatus in fixed positions thereon.

speeds desired wit-11 provide the in any desired manner parallel tomeans of 1 25 till some-rs A tubular shaft N is placed on the shaft .\land to it are fixed three arms P, P and P extending adjacent to the barL. Said arms have their ends properly shaped to enter suitably shapedrecesses in the rods e" I) f and h, it being noted that thearm P has aT-shaped head so that it may engage either of the bars a or b" and thatthe arm P is longer than the others so that it may engage the rod fwhich is extended downwardl as shown, for a reason hereafter set fort\Vliile the rods h, f and I1. are notched so that they may be movedlongitudinally in both. directions by an oscillatory movement of theirengaging arms P, P and P the rod is cut away in front, as indicated indotted lines at c" in Fig. 7, so that it is moved only when its arm P isswung to the rear.

The tubular shaft N with its attached arms may be rotated and also movedlongitudinally by means of a hand lever Q and it has upon it a lockingplate R designed to prevent moyement of those of the four gear operatingrods not actually used to effect any desired change of speed. Said plateslidably engages the bar L, though being, as shown. confined on theshaft N between arms I and P it necessarily moves with the said sha ft.It has in its lower edge certain definitely placed notches of such sizeas to permit the tree longitudinal movement through them. of the rods c.1), etc., which, however, are all notched so as to be immovably heldexcept when the notches in the plate R are i such positions as to permitthereof. Said plate has, as shown in Fig. 7, flanges or lips jllst aboveeach of its notches for the purpose of preventing upward movement of therods when its notches are in line with said notches.

in order to guide the hand lever Q as well as the brake lever Qconnected to the shaft M. I provide a guide gate S shown in Fig. fsupporting it on the side of the automobile. This gate has one largeslot 8 for the brake lever Q and another slotextend ing at right anglesto the first for the lever Q. The latter slot pcrniits movement of \Hltllever parallel to itself -corresponding to a loturitudinal movement ofthe shaft N on the shaft M and. in addition. has five lots a. s s s. s"extending from said slot parallel to the slot s. Of these the slots 8'and a" extend to one side of the main slot. while the remainder cvlendto the opposite ide.

'ith the abme arrangement of parts. when it is desired to couple thegears for the fourth speed. the lever 0 would be moved into the slot .v"and as under these conditions the various armsare in the positions shownin Fig. 4. the rod 5' is moved into the casing A. to couple gears 1! and7)". since it is the only one of the rods engaged by any of the spondsto the notch in the plate.

arms P. Moreover, the remaining rods 6 f and h are immovably locked inplace by the plate R which is in engagement with the notches in all ofsaid rods, the rod 1; being free to move only because its notch corre-For the third speed the lever Q. is moved from the slot at to slot a.thereby partially rotating the shaft i\' and longitudinally moving therod b in a direction the reverse of that previously noted to couplegears b and d. the

remainder of the rods being locked in position. as before noted. For thesecond speed the lever Q is first turned to its mid posi tion and afterbeing moved sidewise is placed in the slot .2. These operations firstmove the plate R so as to bring two of its slots respectively oppositeslots in the rods 6' and at the same time movin -the arms 7 h P and P sothat the ends of these respectively engage said unlocked rods, as shownin Fig. 5. The moving of the lever into slot 8 then so turns the shaft Nthat the rods 6 and f are moved into the casing A, thus making thenecessary combinations of gearing to secure the second speed. Since itis necessary in order to bring the two members of the clutch l intoengagement that the rod f be moved farther than the rod 0'. I providefor this by bending it down. as shown in the figures. and operating itby the arm P. which is of greater length than the others.

The combination of gears for the first speed is made by moving lever Qso as to slide the shaft N on shaft M till said lever is o posite theslot a and then placing it in said slot. This action unlocks rods and h,at the same time causing them to llQ tllgaged by the arms P and Prespectively. and thenv moves said rods into the casing A with theresults desired and heretofore de scribed.

The placing of lever Q in slot .9 moves the rod h outwardly. therebycausing inward movement of the rod through the medium of the lever Z2 Itwill be noted from Fig. 6 that the rod c is still unlocked and has itsand cut away to permit of this. independent movement which. aspreviouslynoted. results in a reversal of the direction of rotation of the shaftC. When the lever Q is returned to its mid or neutral position the rod cis mitomatically returned to its neutral position by the spring a.

I claim as my invention:

1. A transmission gear consisting of two shafts. a plurality of beveledgears fixed to one shaft. an equal number of beveled gears on the othershaft. certain of said latter gears meshing with certain of the gears onthe first shaft and one being movable into and out of engagement with aear on the first shaft. substantially as described.

2. A transmission gear consisting of two -lt:l l a plurality of beveledears fixed to one butt, an equal number of eveled gears M the othershaft, certain of said latter 1t'1tl. meshing with certain of the gearson the first shaft and one being movable into and out of engagement witha gear on the first shaft, with a clutch for connecting said movablegear to its shaft at will, substantially described.

3. The combination in a'transmission gear of two shafts, a plurality ofbevel gears [ixed to one shaft, a plurality of gears loose on the othershaft and in mesh with the gears on the first shaft, means forconnecting any one of said loose gears to its shaft at will, two earslongitudinally movable upon the vsecond shaft to bring one of them intoor out of mesh with one of the bevel gears of the first shaft, a clutchfor connecting the two movable gears to their shaft, an auxiliary shaft,two gears thereon, of which one is placed to mesh with the second one ofsaid movable gears, a gear fixed to the second shaft and placed to enage the second gear on the auxiliary shaft, with means for operating theclutch, substantially as described.

4. The combination in a transmission gear of two shafts, a plurality ofbevel gears fixed to one shaft, a plurality of gears loose on the othershaft and in mesh with the gears on the first shaft, means forconnecting any one of said loose gears to its shaft at will, two gearslongitudinally movable upon the second shaft to bring one of'them intoor out of mesh with one of the bevel gears of the first shaft, a clutchfor connecting the two movable gears to their shaft, an auxiliary shaft,two gears thereon, a gear fixed. to the second shaft and placed to enags the second gear on the auxiliary sha t, with means for operating theclutch and for longitudinally movingsaid auxiliary shaft, substantiallyas described.

A transmission gear having two shafts, a gear fixed to Oneshaft, a pairof gears longitudinally movable on the second shaft to bring one of theminto or out of engage mentwith the gear of the other shaft, a clutchhaving one member fixed to said movable gears and having its secondmember splined to the second shaft, means for moving said two gears uponthe shaft, and other means for moving the second member of the clutchinto and out of engagement with its first member to connect said movablegears to their supporting shaft, with mechanism capable of cotiperatingwith the second of the movable gears for varying the speed of the firstshaft, substantially as described.

6. A transmission gear including two shafts, a gear fixed to one shaft,two gears out of mesh with the gear of the first shaft,

a clutch having a member longitudinally movable upon the second shaft toconnect said movable gears thereto, an auxiliary shaft, two gearsthereon, an additional gear r0 on the second shaft, and means for movingthe gears of the auxiliary shaft to cause them t6 mesh respectively withone of the movable gears and with the additional gear on the secondshaft, substantially'as described.

7. A transmission gear including two shafts, a gear fixed to one shaft,two con- 'nected gears loose upon the other shaft,

means for moving said two gears to cause one of them to mesh with thegear of the other shaft, means for directly connecting said two gears tothe second shaft, and means independent of said direct connection forconnecting at will the second movable gear to the shaft upon which it ismounted, substantially as described.

8. A transmission gear including two shafts, a gear fixed. to one shaft,two con neoted gears loose upon the other shaft, means for moving saidtwo gears to cause one of them to mesh with the gear of the other shaft,means for directly connecting said two gears to the second shaft, saidgearing having parts independent of said direct means for connectingsaid movable gear to the shaft on'which it ismounted, said gearingincludin means for turning said gear in the same irection as said shaft,and other means for turning it in the opposite direc- 100 tion,substantially as described.

9. A transmission gear including two shafts,a gear fixed to one shaft,two gears loose upon the other shaft, means for moving said two gears tocause one of them to 105 mesh with the gear of the other shaft, meansfor directly connecting said two gears to the second shaft, and meansindependent of said direct connection for connecting at will the secondmovable gear to the shaft upon which it is mounted, with gearingindependent of said movable gears for operatively connecting said firstand second shafts, substantially as described.

it). A transmission gear including two shafts, a gear fixed to one ofthe shafts, and two longitudinally movable gears loose upon the othershaft, means for moving said two gears to bring one of them into meshwith the gear of the first shaft, an additional gear on the secondshaft. an auxiliary shaft. two gears thereon. means for longitudinallymoving said auxiliary shaft to throw one of it e'ears out of mesh withone of the gears of the second shaft. with means for moving the secondgear of the auxiliary shaft to bring it into mesh with the additionalgear of the second shaft. substantially as 1'l.'A transmission gearincluding two iiishafts, a gear fixed to one of the shafts, two shaftand two gears thereon, with means 66 gears longitudinally movable on thesecond for moving said gears into mesh with one of the movable gears ofthe second shaft and shaft" to bring one of them into mesh with one ofthe gears on the first shaft, a clutch for directly connecting said twogears to the second shaft, an additional gear on said second shaft, anauxiliary shaft, two gears thereon, means for moving said auxiliaryshaft to throw one of its gears out of mesh with one of the movable earsof the second shaft, and means for moving the second gear of theauxiliary shaft to bring it into mesh with the gear on the second shaft,substantially as described.

12. A transmission gear including two shafts, a gear fixed to one ofsaid shafts, four gears 'on the second shaft, means for longitudinallymoving two of said gears to brin one of them into mesh with the gear oft e first shaft, means for directly connecting said two movable gears tothe second shaft, an auxiliary shaft, two gears thereon, means formoving said latter shaft to throw one of said gears out of mesh with oneof the movable gears of the second shaft, a third shaft having a gearmeshing with one of the gears of the second shaft, and means for movingthe second gear of the auxiliary shaft to bring it either into mesh withthe fourth of the gears on the second shaft or with the gear on thethird shaft. substantially as described.

' connecting said permanently mes 13. The combination of a transmissiongear including two shafts, a gear fixed to one of the shafts, threegears upon the'second shaft, a clutch for connecting two of said gearsdirectly to said second shaft, means for moving said gears on the shaftto bring one of them into mesh with the gear on the first shaft, anauxiliary shaft, a fixed and a loose gear thereon, means forlongitudinally moving said auxiliary shaft to throw its fixed gear outof mesh with one of the two movable gears on the second shaft, means forsliding the loosegear of the auxiliary shaft to cause it to mesh withthe third gear on the .second shaft, and means for causin said twomovable gears on the second she to be driven in a direction the reverseof that of said.second shaft, substantially as described.

14. The combination in a transmission gear of two shafts, a plurality ofbevel gears on one shaft, a lurality of bevel gears loose on the secondshaft, of which certain are germanently in mesh with the gears. on therst shaft, a key or keys for o eratively lied gears to the second shaftat will, two sets of gears loose on the second shaft, means for movingtwo of said loose gears to cause one of them to mesh with a gear on thefirst shaft, a clutch for connecting at will said two movable gears tothe second shaft, an auxiliary with the third gear on said shaftrespectively, suhstantia lyas described.

15. The combination of a drivin and a driven shaft, gearing forconnecting the same, a plurality of rods for actuating said gearing tocause the driving shaft to operate the driven shaft at any of a numberof speeds, an operating shaft having arms capable of engaging said rods,with a lever capable of turnin said shaft and movin it longitudinally,siibstantially as describec.

16. The combination of a drivin and a driven shaft, gearing forconnecting the same, a plurality of rods for actuating said gearing tocause the driving shaft to operate the driven shaft at any of a numberof speeds, an operating shaft having arms capable of en 'ing said rods,a lever for turnin said sm and for movin it longitudina ly, and a gateconstructed to guide and hold said lever in any of a plurality ofpositions, substantially as described.

17. The combination of a driving and a driven shaft, gears forconnecting said shafts, a plurality of Ion itudinally movable rods forconnecting sai gears in different combinations, a rotatable andlongitudinally movable shaft extending transversely of the rods, aplurality of arms on said shaft movable into and out of engagement withthe rods, one of said arms bein capable of' engaging its rod at a. pointarther from the operating shaft than the points of engagement of theother arms and rods, with a lever for operating said shaft,substantially as described.

18. The combination of a driving and a driven shaft, gears forconnecting said shafts, a plurality of rods for connecting said gears indifferent combinations, a shaft extending transversely of the rods, armsthereon, means for moving said shaft on its axis and also longitudinallythereof, with a locking plate movable with said shaft and constructed toengage the rods, said plate being constructed to prevent movement of therods when it is in certain definite positions, substantially asdescribed.

19. The combination of a driving and a driven shaft, gears forconnecting said shafts, a plurality of Ion 'tudinally movable rods forconnecting sai gears in different combinations, a s ring for returningone of the rods to a dc nite position after it has been displacedtherefrom, a single lever for actuating the rods. means for mechanicallconnecting the rod having the spring wit. another one of the rods,whereby said two rods are caused to move in opposite directions,substantially as describe 20. The combination of a driving and a drivenshaft, gears for connecting said shafts a plurality of Ion itudinallymovable rods for connecting sai gears in dillerent combinations, arotatable and longitudinally movable shaft extending transversely of the'structed to fit recesses in the rods, with a notched plate movable withthe shaft and operative in notches in the rods, and means for operatingsaid shaft, substantially as described.

22. The combination of a driving and a driven shaft, gears forconnecting said shafts, a plurality of substantially. arallel rods forconnecting said gears in ifi'erent combinations, a longitudinallymovable and rotatable shaft extendin transversely of the rods, armsfixed to the s aft with spaces between them difierent from the spaces between the rods, said arms being movable into engagement with the rodswhen their supporting shaft is properly moved, with scams described.

23. The combination of a driving and a driven shaft, gears for connectinsaid shafts, a series of substantially paral e1 rods for connecting saidare in different combinations, a series 0 arms movable transversely tothe rods and fixed thereon at distances apart different from thedistances between the rods, a lockin device for'holding those rodsimmovab e which are not engaged by the arms, and a deviceforsimultaneously actuating the arms and the locking device,substantially as described.

24. The combination of a driving and a driven shaft, gears forconnecting said shafts, rods for connecting the gears in differentcombinations, a shaft connectible at will to a rod or rods and movableboth 1011- gitudinally and axially, a single level for actuatin saidshaft,' with a ate having a central s 0t and transverse s ots extendingtherefrom for the reception of the lever, substantially as described.

In testin1ony.whe'reof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

POWELL EVANS. Witnesses means for actuating said shaft), substantially

